Boeing has contacted 737 operators advising them
to inspect the slat track assemblies on certain airplanes.
batch of slat tracks with specific lot numbers produced by a supplier was found to have a potential nonconformance. If
operators find the parts in question, they are to replace them with new ones before returning the airplane to service.
tracks are used to guide the slats located on the leading edge of
an airplaneís wings. Boeing has not been informed of any
in-service issues related to this batch of slat tracks.
is now staging replacement parts at customer bases to help
minimize aircraft downtime while the work is completed. Once the
new parts are in hand, the replacement work should take one to two
days. Boeing has said that it will also issue a safety service bulletin outlining
the steps to take during the inspections.
identified 21 737NGs most likely to have the parts in question. To
ensure a thorough assessment, airlines are advised to check an
additional 112 NGs.
A separate service bulletin will go to 737
MAX operators to do inspections before the MAX fleet returns to
service. Boeing identified 20 737 MAX airplanes that are most
likely to have the parts in question. Operators will be asked to
check an additional 159 MAXs to ensure a thorough assessment.
ďWe are committed to supporting our customers in every way
possible as they identify and replace these potentially
non- conforming tracks,Ē said Kevin McAllister, President & CEO of
Boeing Commercial Airplanes.
The FAA will issue an
Airworthiness Directive making Boeingís recommendations mandatory.